R, s, and t are the vertices of one triangle. e, f, and d are the vertices of another triangle. mangler = 60, mangles = 80, manglef = 60, mangled = 40, rs = 4, and ef = 4. are the two triangles congruent? if yes, explain and tell which segment is congruent to modifying above r t with bar.

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?